A surgical scissors

Abstract

The present invention discloses a pair of surgical scissors, which include a handle, a clamp rod, a locking cap, and a thumbwheel. The thumbwheel has a center sleeve extending toward the proximal end at its center, a center through hole of the center sleeve passing through the thumbwheel, and a proximal end of the center sleeve having an external thread. The locking cap has a through hole passing through it. The fixed handle has a through hole passing through it, the center sleeve is sleeved in the fixed hole, and the proximal end of the center sleeve is threadedly connected to the thumbwheel nut. The center sleeve is sleeved on an actuating rod, the distal end of the actuating rod is detachably rotatably connected to the proximal end of an inner rod, and the actuating rod is used to drive the actuating rod to move along the axis of the center sleeve. The inner end of the outer sleeve is connected to a fixing seat. When the locking cap is threadedly connected to the thumbwheel, the fixing seat is positioned between the locking cap and the thumbwheel, and the inner rod passes through the fixing seat. The handle and the clamp rod of the surgical scissors of the present invention are detachably connected, which enables the clamp rod to be quickly installed and separated, while maintaining the function of the clamp rod rotating relative to the handle.

Description

Technical Field

[0001] The invention relates to a pair of surgical scissors, belonging to the technical field of medical instruments, and in particular to a pair of detachable laparoscopic surgical scissors. Background Art

[0002] Laparoscopic surgical scissors typically consist of a handle and a shaft. Operators control the handle to open and close the scissors at the distal end of the shaft, thereby shearing tissue. Laparoscopic surgery offers many advantages over traditional surgery. First, it minimizes trauma and postoperative scarring. Second, the procedure is a direct, single-cut approach, minimizing damage to surrounding tissue and reducing the chance of postoperative adhesions. Finally, postoperative wound pain is significantly reduced, shortening the length of hospital stay. Existing laparoscopic surgical scissors are mostly non-detachable. This makes them difficult to thoroughly clean and disinfect after disinfection, making reuse highly susceptible to cross-infection and posing significant surgical risks. Therefore, most current laparoscopic surgical scissors are disposable, hindering cost reduction and resource conservation. For example, Patent Document 1 (Publication No. CN110477999A) and Patent Document 2 (Publication No. CN107928724A) disclose laparoscopic surgical medical devices. Summary of the Invention

[0003] In order to achieve rapid installation and disassembly of the clamp rod part and the handle part of the laparoscopic surgical scissors, the present invention provides a surgical scissors, and the specific technical solution is as follows.

[0004] A pair of surgical scissors comprising a handle and a clamp rod, wherein the handle comprises a fixed handle and a movable handle, the clamp rod comprises an outer sleeve and an inner rod sleeved within the outer sleeve, and a scissors portion is provided at the distal end of the clamp rod; the movable handle can move relative to the fixed handle to achieve the opening and closing action of the scissors portion; the surgical scissors are characterized in that they also include a locking cap and a thumbwheel;

[0005] The distal end of the thumbwheel has an external thread, the center of the thumbwheel has a central sleeve extending toward the proximal end, the central through hole of the central sleeve passes through the thumbwheel, and the proximal end of the central sleeve has an external thread;

[0006] The locking cap has a through hole, the distal diameter of the through hole is smaller than the proximal diameter of the through hole, and the proximal end of the through hole is an internal threaded hole;

[0007] The fixed handle has a through hole extending therethrough, the central sleeve is sleeved in the through hole, and the proximal end of the central sleeve is threadedly connected to the thumbwheel nut, and the outer diameters of the thumbwheel nut and the thumbwheel are both larger than the diameter of the through hole of the fixed handle;

[0008] The central sleeve is mounted on the actuating rod, the distal end of the actuating rod is detachably and rotatably connected to the proximal end of the inner rod, and the movable handle is used to drive the actuating rod to move along the axis of the central sleeve;

[0009] The inner end of the outer sleeve is connected to a fixing seat, the outer diameter of the fixing seat is larger than the distal diameter of the through hole and smaller than the proximal diameter of the through hole. When the locking cap is threadedly connected to the thumbwheel, the fixing seat is positioned between the locking cap and the thumbwheel, and the inner rod passes through the fixing seat.

[0010] Furthermore, after the proximal end of the center sleeve is threadedly connected to the thumbwheel nut, the thumbwheel can rotate relative to the fixed handle. The outer surface of the thumbwheel is provided with a plurality of protrusions spaced circumferentially. By designing the length of the center sleeve and the length of the external thread at the proximal end of the center sleeve, the thumbwheel is prevented from being fastened to the fixed handle. The thumbwheel protrusions facilitate the operator's rotation of the thumbwheel, thereby changing the direction of the scissors opening.

[0011] Furthermore, the proximal end of the actuating rod is hinged to the distal end of the connecting piece, the proximal end of the connecting piece is hinged to the movable handle, and the movable handle is also hinged to the movable handle. When the operator presses the movable handle, the movable handle pulls the connecting piece, thereby pulling the actuating rod and the inner rod to close the scissors. A return spring can be provided in certain locations. When the operator releases the movable handle, the movable handle automatically returns to its original position, and the scissors automatically open.

[0012] Furthermore, the scissor portion includes a first scissor blade and a second scissor blade, which are hinged to the outer sleeve via a first scissor pin, and both the first scissor blade and the second scissor blade have a slide groove, and the slide groove of the first scissor blade and the slide groove of the second scissor blade are at a certain angle to each other. The distal end of the inner rod has a second scissor pin, and the second scissor pin is simultaneously inserted into the slide grooves of the first scissor blade and the second scissor blade. When the inner rod moves axially relative to the outer sleeve, the relative movement of the first scissor blade and the second scissor blade realizes the opening and closing movements of the scissor portion, and shearing of the tissue is achieved when closing. The inner rod and the outer sleeve are relatively fixed in the circumferential direction. When the dial is turned, the dial will drive the inner rod and the outer sleeve to rotate synchronously, thereby adjusting the orientation of the scissor portion and facilitating the operation.

[0013] Furthermore, the proximal end of the inner rod has a neck, the proximal end of the neck being connected to a ball, the diameter of the neck being smaller than the diameter of the ball; the distal end of the actuating rod has an end slit for accommodating the neck and a cylindrical groove for accommodating the ball, the cylindrical groove extending perpendicularly to the axis of the actuating rod, and both the end slit and the cylindrical groove extending to the outer surface of the actuating rod. With this arrangement, the proximal end of the inner rod and the distal end of the actuating rod can be detachably connected by movement in a direction perpendicular to the axis of the actuating rod. After connection, the forward and backward movement (axial movement) of the actuating rod can be transmitted to the inner rod, causing it to move forward and backward, and the inner rod can rotate about its own axis relative to the actuating rod. Disassembly is also very convenient, thereby achieving the aforementioned detachable rotational connection.

[0014] Furthermore, the proximal end of the inner rod has a neck, the proximal end of which is connected to a ball, the diameter of the neck being smaller than the diameter of the ball; the distal end of the actuating rod has a claw portion for accommodating the ball, the claw portion including three or more claws spaced circumferentially, the inner surface of each claw being concave, and the inner diameter of the distal end of the claw portion being larger than the diameter of the neck and smaller than the diameter of the ball. This arrangement allows the proximal end of the inner rod and the distal end of the actuating rod to be detachably connected via a snap-fitting motion. After connection, the fore-and-aft motion (axial motion) of the actuating rod is transmitted to the inner rod, causing it to move forward and backward, and the inner rod can rotate about its own axial direction relative to the actuating rod. Disassembly is also very convenient, thereby achieving the aforementioned detachable rotational connection.

[0015] Furthermore, the surgical scissors further include an electrocoagulation assembly disposed on the fixed handle, wherein a contact of the electrocoagulation assembly contacts the actuating rod, and the scissors, inner rod, and actuating rod are all made of metal. The electrocoagulation assembly can use high-frequency current to coagulate small blood vessels to stop bleeding.

[0016] Furthermore, the outer sleeve is a metal tube, and an insulating sleeve is also provided on the outer surface of the outer sleeve. The use of a metal tube for the outer sleeve can improve the structural strength and ensure the stability and reliability of the surgical scissors.

[0017] Compared with the prior art, the handle and the rod of the surgical scissors of the present invention are detachably connected, which enables the rod to be quickly installed and separated, and maintains the function of the rod to rotate relative to the handle; the rod is a disposable component, and the handle is a reusable component, which is beneficial to reducing the cost of surgical scissors. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is an exploded schematic diagram of the surgical scissors of the present invention;

[0019] Figure 2 is a three-dimensional schematic diagram of the surgical scissors of the present invention;

[0020] Figure 3 is a front view of the surgical scissors of the present invention;

[0021] Figure 4 is a cross-sectional view of the surgical scissors of the present invention;

[0022] Figure 5 yes Figure 4 Enlarged view of area A in the middle;

[0023] Figure 6 yes Figure 4 Enlarged view of area B in the middle;

[0024] Figure 7 is a schematic diagram of the proximal end of the inner rod;

[0025] Figure 8 It is a schematic diagram of the action bar.

[0026] In the figure: fixed handle 1, movable handle 2, thumbwheel 3, locking cap 4, clamp rod 5, electrocoagulation assembly 6, scissors part 7, threaded nail 8, first scissors pin 9, first scissor blade 10, second scissor blade 11, insulating sleeve 12, outer sleeve 13, inner rod 14, neck 14.1, second scissors pin 15, thumbwheel nut 16, connecting piece 17, first pin 18, second pin 19, action rod 20, end slit 20.1, cylindrical groove 21, ball part 22, fixing seat 23, protrusion 24, center sleeve 25, contact 26, slide groove 27. DETAILED DESCRIPTION

[0027] The present invention is further described in detail below with reference to the accompanying drawings.

[0028] like Figures 1 to 8 As shown, the surgical scissors of the present invention include a handle portion, a clamp rod portion 5, a locking cap and a thumbwheel;

[0029] The handle portion includes a fixed handle 1 and a movable handle 2. The fixed handle 1 and the movable handle 2 are hingedly connected by a threaded screw 8, and the movable handle 2 can rotate around the threaded screw 8. The proximal end of the connecting piece 17 is hingedly connected to the movable handle 2 through a first pin 18, and the connecting piece 17 can rotate around the first pin 18. The proximal end of the action rod 20 is hingedly connected to the distal end of the connecting piece 17 through a second pin 19.

[0030] like Figure 1 、 Figure 6As shown, the tongs 5 ​​includes an outer sleeve 13 and an inner rod 14 sleeved within the outer sleeve 13. A scissor portion 7 is disposed at the distal end of the tongs 5. The scissor portion 7 includes a first scissor blade 10 and a second scissor blade 11, which are hingedly connected to the outer sleeve 13 via a first scissor pin 9. Each scissor blade 10 and the second scissor blade 11 have a slot 27, which is angled relative to each other. A second scissor pin 15 is disposed at the distal end of the inner rod 14 and is inserted into the slots 27 of both the first and second scissor blades 10, 11. When the inner rod 14 moves axially relative to the outer sleeve 13, the first and second scissor blades 10, 11 move relative to each other, opening and closing the scissor portion 7. When closed, tissue is sheared. The outer sleeve 13 is preferably a metal tube, and an insulating sleeve 12 is also sleeved on its outer surface.

[0031] like Figure 1 As shown, the distal end of the thumbwheel 3 has an external thread, and the center of the thumbwheel 3 has a central sleeve 25 extending toward the proximal end. The central through hole (not shown) of the central sleeve 25 passes through the thumbwheel 3, and the proximal end of the central sleeve 25 has an external thread; the fixed handle 2 has a fixed handle through hole (not shown) passing through it, and the central sleeve 25 is sleeved in the fixed handle through hole, and the proximal end of the central sleeve 25 is threadedly connected to the thumbwheel nut 16, and the outer diameters of the thumbwheel nut 16 and the thumbwheel 3 are both larger than the diameter of the fixed handle through hole; after the proximal end of the central sleeve 25 is threadedly connected to the thumbwheel nut 16, the thumbwheel 3 is axially positioned on the fixed handle 2 by the thumbwheel nut 16, and the thumbwheel 3 can rotate relative to the fixed handle 2, and a plurality of protrusions 24 are circumferentially spaced apart on the outer surface of the thumbwheel 3; by designing the length of the central sleeve 25 and the length of the external thread at the proximal end of the central sleeve 25, it can be achieved that the thumbwheel 3 will not be fastened to the fixed handle 2 (that is, there is a certain gap between the thumbwheel 3 and the fixed handle 2 in the axial direction). The central sleeve 25 is mounted on the actuating rod 20. The distal end of the actuating rod 20 is detachably rotatably connected to the proximal end of the inner rod 14. The movable handle 2 drives the actuating rod 20 to move along the axis of the central sleeve via the connecting piece 17. The detachable rotatable connection here means that the inner rod 14 can rotate about its own axis relative to the actuating rod 20, and the inner rod 14 and the actuating rod 20 are detachably connected in the axial direction.

[0032] The locking cap 4 has a through hole (not shown) passing therethrough, the distal diameter of the through hole is smaller than the proximal diameter of the through hole, and the proximal end of the through hole is an internal threaded hole; the inner end of the outer sleeve 13 is connected to a fixing seat 23, the outer diameter of the fixing seat 23 is larger than the distal diameter of the through hole of the locking cap 4, and smaller than the proximal diameter of the through hole of the locking cap 4. When the locking cap 4 is threadedly connected to the thumbwheel 3, the fixing seat 23 is positioned between the locking cap 4 and the thumbwheel 3, the fixing seat 23 (outer sleeve 13) and the thumbwheel 3 can rotate together, and the inner rod 14 passes through the fixing seat 23.

[0033] like Figure 5 、 Figure 7-8 As shown, to achieve a detachable rotational connection between the actuating rod 20 and the inner rod 14, the proximal end of the inner rod 14 has a neck 14.1, the proximal end of which is connected to a ball 22. The diameter of the neck 14.1 is smaller than that of the ball 22. The distal end of the actuating rod 20 has an end slit 20.1 for accommodating the neck 14.1 and a cylindrical groove 21 for accommodating the ball 22. The cylindrical groove 21 extends perpendicularly to the axis of the actuating rod 20, and both the end slit 20.1 and the cylindrical groove 22 extend to the outer surface of the actuating rod 20. The proximal end of the inner rod 14 and the distal end of the actuating rod 20 can be detachably connected by movement in a direction perpendicular to the axis of the actuating rod 20. After connection, the forward and backward movement (axial movement) of the actuating rod 20 can be transmitted to the inner rod 14, causing it to move forward and backward. The inner rod 14 can also rotate about its own axis relative to the actuating rod 20. Disassembly and assembly are also very convenient.

[0034] like Figure 1 As shown, the surgical scissors further include an electrocoagulation assembly 6 disposed on the fixed handle 2, the contact 26 of the electrocoagulation assembly 6 is in contact with the action rod 20, and the scissors portion 7, the inner rod 14, and the action rod 20 are all made of metal.

[0035] Among them, the distal end and proximal end are relative to the user of the surgical scissors, the end away from the operator is the distal end, and the end close to the operator is the proximal end; the forward and backward movement is also relative to the user of the surgical scissors, the end away from the operator is the front, and the end close to the operator is the back.

[0036] When the movable handle 2 is opened relative to the fixed handle 1, the action rod 20 moves toward the distal end under the drive of the connecting piece 17, and the action rod 20 drives the inner rod 14 to move toward the distal end, and the scissor portion 7 is opened under the action of the inner rod 14;

[0037] When the movable handle 2 is closed relative to the fixed handle 1, the action rod 20 moves toward the proximal end under the drive of the connecting piece 17, and the action rod 20 drives the inner rod 14 to move toward the proximal end. Under the action of the inner rod 14, the scissor part 7 is closed, and the tissue to be cut placed between the first scissor blade 10 and the second scissor blade 11 is cut.

[0038] The installation and disassembly methods of the surgical scissors of the present invention are as follows.

[0039] During installation, the clamp rod (i.e., the outer sleeve 13 and the inner rod 14) is moved in the distal direction through the locking cap 4, and the ball portion 22 at the proximal end of the inner rod 14 is slid into the cylindrical groove 21 of the actuating rod 20. Then, the fixing seat 23 connected to the proximal end of the outer sleeve 13 is located in the locking cap 4, and the locking cap 4 is tightened to the distal end of the thumbwheel 3. The fixing seat 23 is locked between the locking cap 4 and the thumbwheel 3. When the thumbwheel 3 is manually rotated, the outer sleeve 13 and the inner rod 14 rotate together with the thumbwheel 3.

[0040] To disassemble, loosen the locking cap 4 and disengage the locking cap 4 and the thumbwheel 3. After the locking cap 4 is moved distally along the outer sleeve 13 a certain distance, the inner rod 14 can be separated from the actuating rod 20, effectively separating the pliers shaft 5 from the handle. To reuse the pliers, replace the outer sleeve 13, inner rod 14, and scissors 7. The locking cap 4 can be reused or disposable. The thumbwheel 3 can also be easily replaced when necessary.

[0041] It should be noted that to achieve the removable, rotatable connection between the actuating rod 20 and the inner rod 14, alternative arrangements can be employed. For example, the proximal end of the inner rod 14 may include a neck 14.1, the proximal end of which is connected to a ball 22. The diameter of the neck 14.1 is smaller than that of the ball 22. The distal end of the actuating rod 20 may include a claw portion (not shown) for receiving the ball 22. The claw portion includes three or more circumferentially spaced claws (not shown). The claws have concave inner surfaces, and the inner diameter of the distal ends of the claws is larger than the diameter of the neck 14.1 and smaller than the diameter of the ball 22. This allows the proximal end of the inner rod 14 and the distal end of the actuating rod 20 to be removably connected through a snap-fitting motion. After the connection is established, the forward and backward movement (axial movement) of the actuating rod 20 is transmitted to the inner rod 14, causing it to move forward and backward, and the inner rod 14 may rotate about its own axis relative to the actuating rod 20. This connection arrangement facilitates the actuating rod 20 transmitting a thrust force to the inner rod 14 rather than a pull force. In the above embodiment, the action rod 20 pulls the inner rod 14 to realize the shearing action of the scissors part 7. Those skilled in the art will understand that the handle part can also be set to: push the inner rod 14 to realize the shearing action of the scissors part 7, such as changing the inclination direction of the slide groove 27 of the above-mentioned first scissor blade 10 and the second scissor blade 11; or using other forms of scissors parts.

[0042] The form and installation method of the scissor portion 7 can adopt existing technologies, such as the scissor structures disclosed in Patent Document 2 (Publication No. CN107928724A), Patent Document 3 (Publication No. CN209404944U) and Patent Document 4 (Publication No. CN111616775A).

[0043] In addition, the handle portion can also adopt a variety of forms in the existing technology, as long as the movement of the fixed handle 1 can drive the axial movement of the action rod 20, such as the movable handle and its connecting structure disclosed in patent document 1 (publication number CN110477999A), patent document 2 (publication number CN107928724A), patent document 5 (publication number CN112674862A) and patent document 6 (publication number CN102225026B).

[0044] The embodiments of the present invention are described above in conjunction with the accompanying drawings. The embodiments of the present invention and the features thereof may be combined with each other unless there is any conflict. The present invention is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Under the guidance of the present invention, those skilled in the art may devise various forms without departing from the spirit of the present invention and the scope of protection of the claims. All of these forms fall within the scope of protection of the present invention.

Claims

1. A pair of surgical scissors comprising a handle portion and a clamp rod portion (5), wherein the handle portion comprises a fixed handle (1) and a movable handle (2), the clamp rod portion (5) comprises an outer sleeve (13) and an inner rod (14) sleeved in the outer sleeve (13), and a scissors portion (7) is provided at the distal end of the clamp rod portion (5); the movable handle (2) can move relative to the fixed handle (1) to realize the opening and closing action of the scissors portion (7); and the characteristics are: The surgical scissors further include a locking cap (4) and a thumbwheel (3); The distal end of the thumbwheel (3) has an external thread, the center of the thumbwheel (3) has a central sleeve (25) extending toward the proximal end, the central through hole of the central sleeve (25) passes through the thumbwheel (3), and the proximal end of the central sleeve (25) has an external thread; The locking cap (4) has a through hole, the diameter of the distal end of the through hole is smaller than the diameter of the proximal end of the through hole, and the proximal end of the through hole is an internal threaded hole; The fixed handle (1) has a fixed handle through hole, the center sleeve (25) is sleeved in the fixed handle through hole, and the proximal end of the center sleeve (25) is threadedly connected to the thumbwheel nut (16), and the outer diameters of the thumbwheel nut (16) and the thumbwheel (3) are both larger than the diameter of the fixed handle through hole; The central sleeve (25) is sleeved on the action rod (20), the distal end of the action rod (20) is detachably rotatably connected to the proximal end of the inner rod (14), and the movable handle (2) is used to drive the action rod (20) to move along the axis of the central sleeve (25); The inner end of the outer sleeve (13) is connected to a fixing seat (23), and the outer diameter of the fixing seat (23) is larger than the distal diameter of the through hole and smaller than the proximal diameter of the through hole. When the locking cap (4) and the thumbwheel (3) are threadedly connected, the fixing seat (23) is positioned between the locking cap (4) and the thumbwheel (3), and the inner rod (14) passes through the fixing seat (23).

2. The surgical scissors according to claim 1, characterized in that: After the proximal end of the central sleeve (25) is threadedly connected to the thumbwheel nut (16), the thumbwheel (3) can rotate relative to the fixed handle (1), and a plurality of protrusions (24) are provided on the outer surface of the thumbwheel (3) at intervals in the circumferential direction.

3. The surgical scissors according to claim 1, characterized in that: The proximal end of the action rod (20) is hinged to the distal end of the connecting piece (17), the proximal end of the connecting piece (17) is hinged to the movable handle (2), and the movable handle (2) is hinged to the movable handle (2).

4. The surgical scissors according to claim 1, characterized in that: The scissor portion (7) comprises a first scissor blade (10) and a second scissor blade (11), wherein the first scissor blade (10) and the second scissor blade (11) are hinged to the outer sleeve (13) via a first scissor pin (9), and the first scissor blade (10) and the second scissor blade (11) both have a slide groove (27), and the slide groove (27) of the first scissor blade (10) and the slide groove (27) of the second scissor blade (11) form a certain angle with each other. The distal end of the inner rod (14) has a second scissor pin (15), and the second scissor pin (15) is simultaneously inserted into the slide grooves (27) of the first scissor blade (10) and the second scissor blade (11).

5. The surgical scissors according to claim 1, characterized in that: The proximal end of the inner rod (14) has a neck (14.1), the proximal end of the neck (14.1) is connected to a ball (22), and the diameter of the neck (14.1) is smaller than the diameter of the ball (22); the distal end of the action rod (20) has an end slit (20.1) for accommodating the neck (14.1) and a cylindrical groove (21) for accommodating the ball (22), the extension direction of the cylindrical groove (21) is perpendicular to the axis of the action rod (20), and the end slit (20.1) and the cylindrical groove (21) both extend to the outer surface of the action rod (20).

6. The surgical scissors according to claim 1, characterized in that: The proximal end of the inner rod (14) has a neck (14.1), the proximal end of the neck (14.1) is connected to a ball (22), and the diameter of the neck (14.1) is smaller than the diameter of the ball (22); the distal end of the action rod (20) has a claw portion for accommodating the ball (22), the claw portion includes three or more claws spaced apart in the circumferential direction, the inner surface of the claw is concave, and the inner diameter of the distal end of the claw portion is larger than the diameter of the neck (14.1) and smaller than the diameter of the ball (22).

7. The surgical scissors according to claim 1, characterized in that: The surgical scissors further include an electrocoagulation assembly (6) arranged on the fixed handle (1), a contact of the electrocoagulation assembly (6) contacts the action rod (20), and the scissors portion (7), the inner rod (14), and the action rod (20) are all made of metal.

8. The surgical scissors according to claim 1, characterized in that: The outer sleeve (13) is a metal tube, and an insulating sleeve (12) is also sleeved on the outer surface of the outer sleeve (13).

Images